Changeset 25147

Timestamp:

08/28/2013 03:34:50 AM (11 years ago)

Author:

nacin

Message:

Introduce is_main_network().

By default, a network ID of 1 is assumed to be the main network.
Otherwise, it is the first network listed in the wp_site table.

If PRIMARY_NETWORK_ID is defined, it is considered main network.

props jeremyfelt.
see #25030.

File:

• trunk/src/wp-includes/functions.php (modified) (2 diffs)

trunk/src/wp-includes/functions.php

@@ -3247 +3247 @@
 
 /**
- * Is main site?
- *
+ * Whether a site is the main site of the current network.
  *
  * @since 3.0.0
- * @package WordPress
- *
- * @param int $blog_id optional blog id to test (default current blog)
- * @return bool True if not multisite or $blog_id is main site
- */
-function is_main_site( $blog_id = '' ) {
+ *
+ * @param int $site_id Optional. Site ID to test. Defaults to current site.
+ * @return bool True if $site_id is the main site of the network, or if not running multisite.
+ */
+function is_main_site( $site_id = null ) {
+    // This is the current network's information; 'site' is old terminology.
     global $current_site;
 
@@ -3262 +3261 @@
         return true;
 
-    if ( ! $blog_id )
-        $blog_id = get_current_blog_id();
-
-    return $blog_id == $current_site->blog_id;
+    if ( ! $site_id )
+        $site_id = get_current_blog_id();
+
+    return (int) $site_id === (int) $current_site->blog_id;
+}
+
+/**
+ * Whether a network is the main network of the multisite install.
+ *
+ * @since 3.7.0
+ *
+ * @param int $network_id Optional. Network ID to test. Defaults to current network.
+ * @return bool True if $network_id is the main network, or if not running multisite.
+ */
+function is_main_network( $network_id = null ) {
+    global $current_site, $wpdb;
+
+    $current_network_id = (int) $current_site->id;
+
+    if ( ! is_multisite() )
+        return true;
+
+    if ( ! $network_id )
+        $network_id = $current_network_id;
+    $network_id = (int) $network_id;
+
+    if ( defined( 'PRIMARY_NETWORK_ID' ) )
+        return $network_id === (int) PRIMARY_NETWORK_ID;
+
+    if ( 1 === $current_network_id )
+        return $network_id === $current_network_id;
+
+    $primary_network_id = (int) wp_cache_get( 'primary_network_id', 'site-options' );
+
+    if ( $primary_network_id )
+        return $network_id === $primary_network_id;
+
+    $primary_network_id = (int) $wpdb->get_var( "SELECT id FROM $wpdb->site ORDER BY id LIMIT 1" );
+    wp_cache_add( 'primary_network_id', $primary_network_id, 'site-options' );
+
+    return $network_id === $primary_network_id;
 }